Radiating device



P. J. M lNTYRE RADIATING DEVICE Filed March 192g Ill-I'll V as? Illlllllnllllllllln llll!!! Mb? J rim-fran; s rres 1,634,110 PATENT OFFICE.

rnurarc'x J. McINTYRE, ornnrrnorr, MICHIGAN, assrenon 'ro WOLVERINE TUBE COMPANY, A CORPORATION OF MICHIGAN.

RADIATING DEVICE.

Application nice-111M517, 192s. swarm. 95,284.

My invention relates'to radiator tubing, that is to say'tubing intended for radiation in condensers, blowers, refrigerating devices, steam andwater heating-systems, and other I radiators.

Heretofore the conduit or pipe member of the radiator. has had mounted upon its exterior radiator-fins provided with integral sleeves spaced from: each other and embracingthe pipe. In orderxtosec'ure the necessary-tightnessof the fin sleeves upon the pipe it has heretofore been necessary to employ solderor expandthe pipe. The presence of solder interfered with radiation.

The expanding operation was not onlyex-a pensive butlimited the material of the pipe to expandible metal such as copper.

The essential objects-of my invention are to secure an intimate union of the sleeves upon the pipe without'the employment of solderor expansion, and with the added result that the sleeves will be perfectly tight upon the pipe evenewhenthe surface of the latter is irreg1.1lar-;.andfinally to insure that the fin sleeves be not deranged ordetached from the pipe when" and if the originall straight pipe besubsequently bent or coile To the above-endsessentiallymy inventionconsists in such parts and in such combinations of..parts,.and;. in such steps, and

insuch successions of. steps as fall within.

the scope of theappendediclaims.

In the accompanying drawings which form a part of this specification Figure 1' isa. side elevation of a length of radiatmpipe equipped with fins, constructed and appfied according to my invention,

Figure 1 2, asection of the sametaken on line 2-2 of Figure 1',

Figure 3-, a perspective view of a fin before applicationto the pipe, and

Figures i and 5, similar views of modi fied forms of fins before application.

Similar reference characters: indicate similar parts throughoutthe. views.

As hereinshown 7' is the conduit or pipe of ferrous or nonferrous material. To this pipe isapplied the fins, one of which is shown in Figure 3,. and represented generally by the reference numeral 9. The fin, which may be of any peripheral shape, is herein shown as circular. It is formed by cutting a circular blank disk or body 10 froma sheet of thin metal-preferably steel,

pipe the diameter of the outer endof the tapering sleeve opening 14 somewhat less than the external diameter of the pipe while the diameter of the inner end of the opening is slightly greater than the outer diameter of the pipe.

In assembling the fins 9 upon the ipe 7 they are successively forced longituciinall along the pipe, the latter passing throu 1 the openings 14. During this movement t e segments 13 of each sleeve 11 expand, their outer ends tightly engaging the pipe surface, while the inner end of the sleeve overlaps the adjacent sleeve'and forces the outer end ofthe latter into tight engagement with the pipe.

By the overlapping relation of the fin sleeves not only are the sleeves ti htly bound upon the pipe and upon each at er regardless of any irregularity of the pipe surface, but any subsequent bending of the pipe will not force any portion of any sleeve away fromthe pipe. Furthermore increased radiation is afforded by the overlapping char- 'acter of the sleeves because by this means the disks are capable of being cated closer to each other, and thus the number of fins be increased over any given area. The described structure and method are inexpens1ve and simple and avoid soldering and mechanical pipe expansion.

In Figure 4 the tapered or conical fin sleeve'16 differs from the sleeve 11 in that the incisions 17 are not angular, and the segments 18 are of different shape.

In Figure 5 the conical fin sleeve 19 is without incision, and not segmental. While this construction of fin sleeve possesses some of the advantages of my invention it does not possess all.

I claim 1. In a device of the type set forth, a pipe, and fins having normall tapered sleeves surrounding the pipe and eld thereon by friction solely with the sleeves of the fins having their free ends forced one Within the other at the posterior end of the next adjacent, said sleeves being slitted to form independent segments whereby the end of one sleeve of the ad aCent sleeve binding the latter tightlv onto the ipe.

2. he metho of securin fins to a radiator pipe or the like, winch consists in forming in the centre of the fin bodies tapering sleeves tapered upon straight lines of less diameter than the exterior diameter pinches the ends of the segments of the pipe, and then forcin the sleeves successively upon the pipeand partly over the sleeve of the adjacent fin wherebythe inner end of each sleeve clamps the outer end of an adjacent sleeve tightly onto the pipe to additionally secure it thereon, in close fitting contact to hold them immovably in place solely by frictional contact with each other and with the pipe.

In testimony whereof I have aflixed my signature.

PATRICK J. MoINTYRE. 

